Projection system



I Oct. 17,1950 SCHULER 2,525,957

PROJECTION SYSTEM Filed Feb. 9, 1948 4 Sheets-Sheet 1 INVENTOR REGINALDG. SCHULER ATTORNEY Oct. 17, 1950 R a, SCHULER.

moamc'rxou SYSTEM 4 Sheets-Sheet 2 Filed Feb. 9, 1948 um\\\\\\\\\\\\\\\\\s mvemoa ATTORNEY C SM W D E R? w 0d. 17, 1950 sc u ER2,525,957

PROJECTION SYSTEM Filed Feb. 9, 1948 v 4 Sheets-Sheet I5 FIG. 8 INVENTORV REGINALD G. SCHULER ATTORNEY Oct. 17, 1950 R. e. SCHULER PROJECTIONSYSTEM 4 Sheets-Sheet 4 Filed Feb. 9, 1948 INVENTOR REGINALD G. SCHULERB rlqlll llllllllmllll ATTORNEY Patented Oct. 17, 1950' UNITEDPROJECTION SYSTEM Reginald G. Schuler, Crystal Lake, 111., assignor toTeletype Corporation, Chicago, 111., a corporation of DelawareApplication February 9, 1948, Serial No. 7,256

6 Claims.

This invention relates to display apparatus and more particularly tocombined news and" advertising projectors.

In the present invention an advertising or pictorial display device isused alternately with a printing telegraph machine. News items receivedon a telegraph printer, preferably of the page type, are printed on asuitable recording medium which is advanced into the field of aprojector. The projector field is large enough so that several lines ofprinted material may be projected upon a suitable screen, the printedrecord being advanced through the projector field in a stepped manner bythe line feed mechanism on the telegraph printer. When the end of acertain news item or group of news items is reached a special signal istransmitted by the transmitting station, which signal actuates a specialfunction lever in the receiving printer to break the circuit to a firstmagnet and make the circuit to a second magnet. The two magnets controla mechanism which renders the news projector inoperable and actuates anadvertising projector. Transmission of a second special signal by thetransmitting station actuates a second special function lever in thereceiving printer to break the circuit to the second magnet and make thecircuit to the first magnet, thereby stopping the advertising projectorand again actuating the news projector.

Provision is also made in this invention for changing the advertisingdisplays projected upon the screen between the news items. To accomplishthis a rack is provided foraccommodating a number of advertising slides.Whenever the advertising projector is actuated one of the slides ismoved into the field of the projector, and thereafter when the newsprojector is again actuated this slide is moved out of the field of theprojector and the rack is advanced a step so that the image of the nextslide will be projected upon the screen when the advertising projectoris again actuated. When the rack has been stepped to the position wherethe images of all of the slides contained therein have been projectedupon the screen a mechanism is actuated for returning the rack to itsoriginal position and each of the slide images is against projectedsuccessively upon the screen.

One of the objects of the invention is to provide a display apparatuswherein a news projector and an advertising projector are combined andare alternately operable whereby news items or advertising material maybe projected on a common screen.

Another object of the invention is to provide a combined news andadvertising projector under the control of the station transmitting thenews items.

Still another object of the invention is to provide a combined news andadvertising projector wherein a printing telegraph receiver forreceiving the news items is provided with means responsive to specialtelegraph signals for rendering either the news projector or theadvertising projector operable.

A further object of the invention is to provide a combined news andadvertising projector wherein news items may be typed by a printingtelegraph receiver while advertising is being displayed.

A still further object of the invention is to provide a combined newsand advertising projector wherein a different advertising display isautomatically projected on the screen with each actuation of theadvertising projector.

Yet another object of the invention is to provide a combined news andadvertising projector wherein the advertising display may be changed byremote control.

These and other objects and advantages will appear from the followingdetailed description when read in conjunction with the accompanyingdrawings in which:

Fig. 1 is a side elevational View showing broadly the main embodiment ofthe invention;

Fig. 2 is a detail view of a portion of the advertising projector shownin Fig. 1;

Fig. 3 is a side elevational view of the details shown in Fig. 2;

Fig. 4 is a detail view of the mechanism for actuating the difierentprojectors;

Fig. 5 is a detail view of one of the function levers responsive tospecial signals for closing the contacts in the projector controlcircuit;

Fig. 6 is a side elevational view of the details shown in Fig. 5;

Fig. 7 is a diagram of the projector control circuit;

Fig. 8 is a fragmentary side elevational view showing a modified form ofthe invention;

Fig. 9 is a detail view of a vignette disc used in the modificationshown in Fig. 8;

Fig. 10 is a fragmentary side elevational view showing the modificationshown in Fig. 8 as applied to a combined news and advertising projectorwherein the advertising slide is of a size such as that from a smallcamera;

Fig. 11 is a'sectional view taken substantially along the line ll inFig. 10;

- projector Fig. 12 is a sectional view taken substantially along theline 22 in Fig.

Fig. 13 is a sectional view taken substantially along the line 3--3 inFig. 10; 1

Fig. 14 is a fragmentary elevational view of a second modification ofthe invention; and

Fig. 15 is a detail view of the irises in the objective lenses shown inFig. 14.

For a complete understanding of this invention reference should be hadto U. S. Patent No. 1,904,164 issued to Morton et al., April 18, 1933,showing a telegraph printer of the page type suitable for purposes ofthis invention. Only such parts of the printer shown in the Morton etal. patent are referred to in the following description or shown in theaccompanying drawings as are deemed necessary to facilitate anunderstanding of the features and operation of the present invention.

In the drawings a lower compartment II houses a printing telegraphreceiver I2, news indicated generally by reference numeral I3, and. anadvertising projector indicated generally by reference numeral I4. Anupper compartment I6, suitably secured to the lower compartment II, hasa viewing screen I1 at one side thereof and houses a suitably mountedreflecting mirror 18. A pair of supports I9 and 2I are mounted securelywithin the lower compartment II to provide support for the various partsenclosed within the lower compartment.

The news projector I3 has a suitable light source 22 and reflector 23mounted within a housing 24 secured to the support 2I. A condenser lenssystem 26 of the news projector I3' is secured to the support 2I and anobjective lens system 21 mounted suitably within the lower compartmentII is common to both the news projector I3 and the advertising projectorI4. A mirror 28 for reflecting the image from the news projector I3 ismounted within a carriage 29 which also encloses a reflecting mirror 3Ifor reflecting the advertising image towards the common objective lenssystem 21.

The printing telegraph receiver I2 has a supply roller 32' on which atransparent recording form or tape 33 is rolled. From the supply roller32 the transparent tape 33 follows an obvious path (Fig. 1) over aplurality of unnumbered guide rollers to a take-up roller 34.Thetransparent tape 33, in its path of travel, passes through the fieldof the news projector I3 in the image plane thereof which insures that aclear image of the news item on the tape 33 will appear on the screenI1. The transparent tape 33 is advanced by the line feed mechanism ofthe telegraph printer I2 in a stepped manner through the news projectorfield, the roller 34 holding the tape 33 in a taut condition at alltimes in order to prevent distortion of the image on the screen I1 dueto curvature. of the tape from the image plane. The type bars of printerl2 are represented by a single type bar 38 which strikes a platen 31 toprint the message on the transparent tape 33.

The advertising projector I4 has a light source 38 and a reflector 39mounted within a suitable housing 4'I. The advertising projector I4 isprovided with a condenser lens system 42 which is secured to the support2|. A series of advertising slides 43 are positioned in a movablecarriage 44 from which they are moved sequentially into the image planeof the advertising projector erates with a pinion 48 to accomplish theabove described moving of the carriage 29.

A continuously operating motor 49 is secured to the support I9 and has agear 5I mounted on its shaft 52. The gear 5| meshes with a gear 53 on ashaft 54, and another gear 58 on the shaft 54 in turn meshes with a gear51 secured to a sleeve 58 which comprises the drive member of a frictionclutch. The sleeve 58 is rotatable around a shaft 59 to which is pinneda pair of sleeves 6| having flanges 62 thereon which comprise the drivenmember of the friction clutch. Between the ends of the sleeve 58 and theflanges 82 there are positioned a pair of felt friction washers 63 whichallow the sleeve 58 to rotate relative to the sleeves 6I when the shaft59 is prevented from rotating, but which supply sumcient frictionbetween the sleeve 58 and flanges 82 to allow the sleeves GI to bedriven when the shaft 59 is not prevented positively from rotating. Theshaft 59 is journalled in a pair of brackets 64 mounted fixedly on asupport plate 86 which is secured to the support I9.

The details of the mechanism for controlling the rotation of the shaft59 are shown in Fig. 4. The shaft 59 has secured thereto a cam disc 31having a pair of locking notches 68 in the periphery thereof disposeddiametrically opposite one another. Mounted pivotally by bolts 89 forcooperation with the locking notches 88 are a pair of armatures TI and12 which are controlled respectively by a pair of magnets 13 and 14,mounted securely on the bracket 54. Suffice to say at this point thatwhen one of the magnets 13 or-14 is energized the other is substantiallysimultaneously de-energized and. vice versa, so that at all times one orthe other of the magnets 13 or 14 will be pulling up its armature. Alsothe magnets 13 or 14 are somewhat slow to release so that both armaturesH and 12 are pulled up momentarily. However the magnet which has beende-energized will release its armature before the shaft 59 completes 180of its revolution.

Considering as normal the position of parts as shown in Fig. 4, themagnet 13 is at this time energized and the magnet 14 is de-energized.Subsequent energization of the magnet 14 causes it to pull up thearmature12 releasing the shaft 59 for rotation by the drive member orsleeve 58 of the friction clutch. Because the magnet 13 is somewhat slowto release, the armature H is not immediately released at the moment ofenergization of magnet 14 and de-energization of magnet 13, but insteadis released a short time later engaging the opposite locking notch 68upon the completion of 180 of rotation of the shaft 59.

A cam 18 secured to the shaft 59 cooperates with a, follower 11 on arack lever 18 mounted pivotally on a bolt 19 secured to the bracket 64.The rack lever 18 has a toothed portion 8I thereon which cooperates witha pinion 82. The pinions 82 and 48 are secured to a sleeve 83 which isfreely rotatable on a shaft 84 journalled in a, pair of brackets 85 and88 secured to the support 2I. When the shaft 59 is in the position shownin Fig. 4 the high side of the cam 18 is opposite the follower 11. Whenthe shaft 59 is released for a half revolution due to the energizationof magnet 14 and de-energization of magnet 13, the follower 11 rides offthe high portion of the cam 16 to the low portion thereof. At this timea tension spring 88 pivots the rack lever 18 counterclockwise (Fig. 3)to rotate the pinion 82 which in turn causes the rack 41 and carriage 29to move to the right bringing the mirror 28 in line with the objectivelens system 21. A subsequent rotation of the shaft 59 through a second180 causes the follower 11 to ride from the low part of the cam 16 tothe high part thereof which pivots the rack lever 18 clockwise toeffectuate a. leftward movement of the mirror carriage 29 (Fig. 3), thusbringing the mirror 3| back to the position shown in Fig. 3 in alignmentwith the objective lens system 21.

The movable carriage 44 is slidable longitudinally along a pair of rods89 which rods are mounted securely in a pair of brackets 9|. Thecarriage 44 has a series of dividers 92 on the base thereof and a combplate 93 at the top. The slides 43 are adapted to slide in the slots inthe comb plate 93 and between the dividers 92. A stop plate 94 bolted tothe carriage 44 maintains the slides 43 in proper longitudinal alignmentwithin the carriage 44.

A rack 96, having pair of lugs 91 protruding therefrom is slidablelongitudinally to move the slide 43, which is aligned with the imageplane of the advertising projector, into a posit on aligned with thecondenser lens system 42. The rack 96 is moved in this manner to bringthe selected slide 43 into the image plane of the advertising projectorslightly later than but during the same half revolution of the shaft 59that the mirror 3| is moved into reflecting position behind thecondenser lens system 42.

Following is a description of the mechanism for moving the rack 96. Acam 98, secured to the shaft 59, cooperates with a follower 99 on a racklever IOI pivoted on the bolt 19. The rack lever IOI is biased by aspring I02 in order to hold the follower 99 against the cam 98. The racklever I 0| has a toothed portion I03 which cooperates with a pinion I04secured to a sleeve I06 rotatable on the shaft 84. Secured to the otherend of the sleeve I06 is a pinion I01. A spacer sleeve I08 maintains thepinions 82 and I04 and sleeves 83 and I06 in proper spaced relation onthe shaft 84. The pinion I01 cooperates with the rack 96. When the shaft59 rotates through the first half revolution from the position thereofshown in Fig. 4 the follower 99 moves from the high part of the cam 98to the low part thereof and the spring I02 urges the rack lever IOIcounterclockwise (Fig. 3) to rotate the pinions I04 and I01counterclockwise to move the rack 96 to the right. During the next halfrevolution of the shaft 59, the follower 99 moves to the high part ofthe cam 98 resulting in a movement of the rack 96 to its leftwardposition whereby one of the slides 43 is carried to the left due to theaction of the lugs 91 coop erating with such slide 43. The timing of thecams 98 and 16 is such that the slide 43 is positioned in the imageplane of the advertising projector following the alignment of theadvertising reflecting mirror 3| in reflecting position behind thecondenser lens system 42. It should here be noted that the relativelocation of the high and low portions of the earns 16 and 98, as shownin Fig. 3 is distorted in order that both of the two rack levers 18 andIM may be shown. When the cam 16 is in the position shown, with thefollower 11 on the high part of cam 16, the

follower 99 is also on the high part of cam 98 and the slide carriage 44and mirror 3| are properly aligned in order that the image of theadvertisement on the slide 43 is projected on the screen I1. Y

In order that the image of a different slide 43 will be projected on thescreen I1 between projections of news items it is necessary to advancethe slide carriage 44 one step during each complete revolution of theshaft 59 to bring a different slide 43 into alignment with the lugs 91on the rack 96. The carriage 44 is provided with a ratchet I09 withwhich a stepping pawl III cooperates. The stepping pawl III is securedpivotally by a bolt II2 to a bell crank II3 pivoted at H4, and the bellcrank II3 carries a follower roller H6. The roller II6 coo erates with acam II1 secured to the shaft 59. When the cam II1 rotates such that theroller II6 moves from the low part of the cam II1 to the high partthereof, the bell crank H3 is pivoted counterclockwise about pivot pointII4 to move the pawl III to the left (Fig. 2) in order to advance theratchet I09 one step. The ratchet I09 having thus been advanced a step,a second pawl II8 which acts as a holding pawl engages another tooth onthe ratchet I 09 to hold it in its stepped position. Thereafter duringthe next half revolution of the shaft 59, the low part of the cam II1presents itself to the roller H6 and a spring (not shown) on the bellcrank II3 pivots the bell crank II3 clockwise to move the pawl I II tothe right preparing it for the next stepping operation. The high part ofthe cam II1 engages the roller II6 prior to the engagement of the highpart of the cam 98 with the follower 99 insuring that the slide 43 willbe aligned with the lugs 91 before the rack 96 is moved to position theslide 43 in the image plane of the advertising projector. The low partof the cam II1 presents itself opposite the roller II6 to return thepawl III to the right (Fig. 2) prior to the return of the rack 96 to theright (Fig. 3), however it is only essential that the pawl III bereturned in time to complete its next subsequent stepping operation.

When the slide carriage 44 has been stepped to the position where thelast slide 43 to the right in the carriage 44 has been moved into theimage plane of the advertising projector, a subsequent steppingoperation by the pawl III causes the carriage 44 to engage and pivot alever II9 counterclockwise (Fig. 2) about its pivot bolt I2I. A link I22secured pivotally to the lever H9, and slidable longitudinally, has apin I23 adapted to engage the depending arm of the pawl I I8, pivotingthe pawl II8 counterclockwise about a pivot bolt I24 to disengage thepawl H8 from the ratchet I09. The pawl H8 carries a lug I26 which, whenthe pawl H8 is pivoted from engagement with the ratchet I69 by the pinII 4, engages the pawl III to also move it from engagement with theratchet I09. The link I22 has a shoulder I21 which engages a pivotallocking lever I28 mounted pivotally by a bolt I29. When the link I22 ismoved to the right due to engagement of the carriage 44 with the lever II9, the shoulder I21 is locked by the locking lever I26 and thus holdsthe pawls III and H8 from engagement with the ratchet I09 while thecarriage 44 is returned to start position at the right under the urgingof a spring I30.- A blocking lever I32, also mounted pivotally on thebolt I29, is secured pivotally by a bolt I33 to a piston rod I34. Apiston I36 is slidable within a cylinder I31, however sliding movementof the piston I36 is opposed by increased air pressure on the forwardside of the piston I36 and by vacuum on the rearward side of the pistonI35 within the cylinder I31. The cylinder I31 is provided withadjustable exhaust outlets at either end thereof in order that the airmay escape and enter allowing the air pressure within the cylinder toslowly return to normal when it is increased or decreased due tomovement of the piston I36. A projecting arm I35 on the lever I32engages the lever I28 to cause disengagement of the lever I28 from theshoulder I21 whenever lever I32 is pivoted clockwise. Upon the return ofthe slide carriage 44 to the right or start position it strikes thelever I32 with considerable force. The resulting shock is absorbed bythe air within the cylinder I31 due to the movement of the piston I36.Pivotal movement of the lever I32 causes the arm I38 to lift the lockinglever I28 from locking engagement with the shoulder I21 and a spring I3Iattached to the lever II9 moves the link I22 withdrawing the pin I23from engagement with the depending arm of the pawl II8. Release of thepawl II8 also permits the pawl III to engage the ratchet I09 on the nextnormal stepping operation.

The interval of time required between the stepping of the carriage 44 toactuate the link I22 .and associated mechanism and the return of thecarriage 44 to its rightward position is less than the interval betweenthe normal stepping of the carriage 44 and the actuation of the rack 96to move the slide 43 into the image plane of the advertising projectorI4. When the carriage 44 has returned to its start position it is sopositioned that the rack 96, on its actuation immediately followin movesthe slide 43, furthermost togthe left in the carriage 44, into the imageplane of the advertising projector.

There is shown in Figs. 5, 6 and 7 the mechanism for actuating themagnets 13 and 14 which determines which projector is to project itsinformation upon the screen I1. It is apparent from Fig. 7 that eitherthe circuit through the magnet 13 or that through 14 is closed at alltimes except. while the switching operation is in progress.

A set of selector vanes MI in the receiving telegraph printer I2 ispermutably positioned in response to incoming signals from a distanttransmitting station (not shown). After each permutation has been set upin the vanes I a function lever bail I42 pivots downwardly and allows aset of function levers, represented by function levers I43 and I44, topivot clockwise about a pivot rod I46 to sense the vanes I4I. When thepermutation existing in the vanes I4I corresponds to one of the functionlevers I43 or I44, such function lever pivots further clockwise toperform its designated function.

The function levers I43 and I44 have forward extensions thereon,designated respectively by reference numerals I41 and I48, which extendthrough a pair of slots I49 in a front plate I5I of the receivingprinter I2 to cooperate with a switching lever I52 pivoted at I53. Whenthe function levers I43 or I44 are in unselected position the forwardextensions I41 and I48 are held above the switching lever I52, but wheneither function lever I43 or I44 is selected, the forward extension I41or I48 thereof pivots, clockwise,

. moving the corresponding end of the switching shown) is provided tohold the switching lever I52 in either one of its two possible positionsuntil actuated to its other position. The swinger I54 and the contactsI56 and I51 are insulated from one another and are mounted in aninsulator block I58. Terminal screws I58 also are mounted in theinsulator block I58, being suitably con-' nected to the proper contactsI56 and I51 or swinger I54, to provide a convenient connection for leadsI6I and I62 to magnets 14 and 13 respectively. When the switching leverI52 is in :the position shown in Fig. 6 a circuit is closed (see Fig.'1) from positive battery, through a suitable resistance I63, swingerI54, contact I55, lead I62, magnet 13 to ground. When the switchinglever I52 is pivoted counterclockwise by the forward extension I41 whenthe function lever I43 is selected the aforementioned circuit throughthe magnet 13 is opened and a circuit is established from positivebattery, through the resistance I63, swinger I54, contact I51, lead I5I,magnet 14 to ground. When the switching lever I52 is returned to theposition shown in Fig. 6

the magnet 14 is de-energized and the magnet 13 is energized.

In operation the position of the parts as shown in the drawings (Figs. 1through 7) is that posi tion thereof for operation of the advertisingprojector I4, except that in Fig. 3 the slide 43 and rack 96 should bein their leftward positions and mechanism associated therewithcorrespondingly should be in its other position at this time instead ofthe positions thereof as shown. At this time the news projector I3 isinoperative to project its information on the screen I1 due to theposition of the reflecting mirror 28 out of the focus line of the newsprojector I3. The printer I2 may or may not be printing a message on thetape 33 at this time.

Receipt of a signal from the distant station, in response to which thefunction lever I43 is actuated, causes the circuit to magnet 14 to beclosed and the circuit to magnet 13 to be opened causing the rotation ofthe shaft 59 through 180". Due to such rotation of the shaft 59, theslide 43 in the image plane of the advertising projector is moved backinto position within the carriage 44 and the mirror carriage 29 is movedto the right in order to project the news item on the screen I1 If asubsequent signal is received in response to which the function lever I43 again performs its function, nothing happens as the switching leverI52 remains in whichever position it is moved until again moved by theother function lever I43 or I44. When the news projector is operating,

' receipt of a signal by the printer I2, in response to which thefunction lever I44 is actuated to perform its function, results in therelease of the shaft 53 through a second Such rotation of the shaft 59causes the carriage 44 to be advanced one step, the slide 43 to be movedinto the image plane of the advertising projector, and the mirror 3| tobe moved whereby the advertising projector is rendered operative. J

In the following description of a. modification of the invention likereference numerals are used to indicate parts identical with thosealready described and only such parts are shown in the drawings as aredeemed necessary to adequately differentiate such modification-from thefirst embodiment of the invention.

Referring to Fig. 8 the lower compartment II houses the news projectorI3 having the light cording form or tape 88. which lies in the imageplane of the news projector I3 is shown. The advertising projector I4 isrepresented by its light source 38, reflector 39, and condenser lenssystem 42, and only the slide 43 is shown which is positioned in theimage plane of the advertising projector I4. The mechanism for changingthe slides 43 in this embodiment is identical with that alreadydescribed. A pair of supporting arms I'I l mounts securely a pair ofobjective lens systems Ill and H2 which are parts of the news andadvertising projectors l3 and I4 respectively. A pair of reflectingmirrors I14 and 5 are rigidly mounted within the lower compartment IIand respectively iormparts of the news and advertising projectors .Isend I4.

A vignette disc 'I'Il is enclosed suitably in a housing I78 securedwithin the lowe compartment II. The housing I18 has a pair of apertureI8I and I82 diametrically opposite on another positioned respectively inalignment with theobjective lens systems I12 and I13. The vig'nette discITI is rotatable within the housing "8 and is secured to a shaft I83rotatable within a sleeve I84. A pinion I88, secured to the shaft I83,cooperates with a set of teeth on a rack I81, the rack I81 having asecond set of teeth thereon cooperating with a pinion I88. The pinionI88 is secured to a sleeve I89 which is rotatable on a shaft I9I and asecond pinion I92 secured to the sleeve I89 cooperates with a rack leverI93 which is similar to the rack levers I8 and IN already described. Therack lever I93 is mounted pivotally on a bolt I94 and a follower (notshown) on the rack lever I93 is continuously urged against a cam I98 onthe shaft 59 by a spring I91.

The vignette disc I'I'I has a transparent section I95 the width of whichis substantially equal to the diameter of the apertures I8I or I82 andthe arcuate length of which covers approximately 180 of the vignettedisc Ill. The arcuate transparent section I95 is positioned radially inthe vignette disc I" aligned with the apertures I8I or I82. When thevignette disc I1! is in a stopped position the approximate center of thetransparent section I95 is aligned with one of the apertures I8I or I82.When the shaft 59 is rotated through a 'half revolution in. response tosignals received by the printing receiver, the rack lever I93 inoscillating, rotates the pinion I92 which rotation is transferred to thepinion I88 to move the rack I81. Movement of the rack I 81 causes thepinion I88 to rotate the vignette disc I11 allowing one of theprojectors to operate and preventing operation of the other projector.Subsequent rotation of the shaft 59 through a second half revolutionreturns 'the projectors to the former condition.

Referring now to Fig. 10,a combined news and advertising projector isshown wherein the advertising slides are relatively quite small such asthose from a small camera. I In this case the advertising projector MAis a miniature of the advertising projector I4 and in order to enlargethe image projected on the screen I! the objective lens system of theadvertising projector is brought nearer to the image plane of theadvertising projector MA.

The lower compartment II houses the news projector I3 represented by thelight source 22. reflector 23, condenser lens system, and the portion oftransparent tape 33 within the news projector field. The miniatureadvertising projector MA is represented by the light source 38A,reflector 39A, condenser lens system 42A and a single miniature slide43A. A pair of reflecting mirrors 20I and 202, respectively, parts ofthe news projector I3 and advertising projector A, are mounted on amirror frame 203 mounted suitably in the lower compartment II. Anobjective lens system 204 is provided for the news projector I3 and anobjective lens system 208, mounted on a suitable support 201 within thelower compartment II, is provided for the advertising projector MA. Thelight rays from both projectors are ultimately reflected by thereflecting mirror I8 to the screen II.

The mechanism for determining which of the two projectors I3 or MA is tobe operable is identical with the mechanism previously described whichis responsive to special signals transmitted by the distant telegraphtransmitter. For controlling the operation of the news projector avignette disc 208 is secured to a sleeve 289 which together arerotatable about a shaft 2 secured to a support 2I2. A gear 2I3 is alsosecured to the sleeve 209 and meshes with an intermediate gear 2I4secured to a sleeve 2l8 rotatable about a shaft 2I' I also secured tothe support 2I2. The intermediate gear 2I4 meshes with a gear 2I8secured to the shaft 59 which is rotated through half revolutions inresponse to signals transmitted by the distant transmitter. A plate 2I9,secured to the support 2I, has an aperture 22I therein which is alignedwith the image projected by the news projector I3 and together with thecooperating vignette disc 208 controls the operation of the newsprojector I3. The vignette disc 208 is constructed like the vignettedisc Ill, already described, and cooperates with the aperture 22I torender the news projector I3 and advertising projector I4A operablealternately.

A vignette disc 222 similar to the vignette disc 208,'isprovided, forcontrolling the operation of the advertising projector MA and is securedto a sleeve 223 to which is also secured a gear 224, the sleeve 223being rotatable about a bolt 228 secured to a support 221. The gear 224meshes with an intermediate gear 228 on a sleeve 229 rotatable on a bolt23I secured to the support 221. The intermediate gear 228 meshes with agear-232 secured to and rotatable with the shaft 59. A plate 233,securedto' the support 2I, has an aperture 234 therein which is alignedwith the image projected bythe advertising projector [4A and cooperateswith the vignette disc 222 to control the operation of the advertisingprojector It should be noted at this point that the gears 224 and 232are of the same diameter and likewise; the gears 2I3 and 2I8 are thesame size which insure that a half revolution of the shaft 59 will causethe vignette discs 222 and 208 to rotate a half revolution. Thetransparent sections of the vignette discs 288 and 222 are, at alltimes,

positioned from one another which insures that one, and only one, of theprojectors will project its image on the screen I I.

An alternate means for controlling the operation of the advertisingprojector MA is shown in detail in Fig. 13. A vignette disc 24I of thetype already referred to, having a transparent section 242 of arcuatelength of approximately 180, and a gear 243 are both secured to a sleeve244 which is rotatable about a., shaft 246. A plate 241 is secured tothe support 2I and mounts rigidly the shaft 248. The plate 241 alsohasan aperture 248 therein which cooperates with the vignette disc 24Ito control the operation of the advertising projector MA in a mannerlike that already de- 11 scribed. The vignette disc 24! is rotated by arack lever 248 mounted pivotally on a shaft 26!. which rack lever 248has a follower 252 which is continuously urged by a spring 254 against acam 263 secured to the shaft 68. In the normal stop position of theshaft 68 the'foilower 252 is positioned on the lower half of the cam 263as shown. Subsequent rotation of the shaft 58, in response to a signalfrom the distant transmitting station, through a half revolution, causesthe follower 252 to travel to the high part of the cam 253, pivoting therack lever 249 clockwise and rotating the gear 243 and vignette disc 24!counterclockwise to move the transparent section 242 into alignment withthe aperture 248. Therefore at this time the advertising projector isoperable. During this first half revolution of the shaft 58 the vignettedisc 208 will have been rotated to the point where the opaque section ofthe vignette disc 268 is aligned with the aperture 22l in the plate 2I9and the news projector I3 is thereby rendered inoperable. Rotation ofthe shaft 59 through a second half revolution results in the clockwiserotation of the vignette disc 24! until the opaque section thereof isaligned with the aperture 248 to render the advertising projector 14Ainoperable and the vignette disc 208 is moved to the position where thenews projector I3 is operable.

Figs. 14 and 15 show a pair of objective lens systems each of which isprovided with an iris or shutter for controlling the projection rom therespective projector. Only the parts are shown in Figs. 14 and 15 whichare different from those which have previously been described, or

which are deemed necessary for a complete understanding of thismodification of the invention.

The mirrors I14 and 115 are provided for reflecting the images from thenews and advertising projectors l3 and I4 respectively. The condenserlens system 42 of the advertising projector and one of the advertisingslides 43 are also shown in Fig. 14. A pair of objective lens systems26l and 262 are suitably mounted by the supporting arms Hi. Theobjective lens systems 26l and 262 are provided respectively with irisesor shutters 263 and 264 which may be closed or opened by rotation. Theirises 283 and 264 are formed integrally with peripheral gears 266 and286 which coact respectively with toothed portions 261 and 268 on a rack21!. The rack 2" has an elongated slot 212 by means of which the rack isslidable longitudinally on a pairof bolts 213 and 214 secured suitablywithin the lower compartment II. The rack 211 has another toothedportion 216 which cooperates with a pinion 21'! mounted on a rotatablesleeve 218. The sleeve 218 carries another pinion 219 and is rotatableon a shaft 28! mounted fixedly within the lower compartment II. A racklever 282 is mounted pivotally on a shaft 283 and when pivoted engagesthe pinion 218. The rack lever 282 carries a follower (not shown) whichis continuously urged against a cam 284 mounted on the shaft 58 by aspring 286.

When the shaft 59 is released for a half revolution the rack lever 282pivots to rotate the sleeve 218. Rotation of the sleeve 218 causes therack 21! to be moved bythe pinion 211 which in turn rotates the twogears 265 and 266. As the rack lever 282 is pivoted due to its followerriding up the high portion of the cam 284 the iris or shutter 263 isclosed and the iris or shutter 264 is opened to render the advertisingprojector operable. During the second half revolution of the shaft 68the follower on the rack lever 282 moves from the high part to the lowpart of the cam 284 causing the gear 288 to be rotated clockwise and thegear 266 to be rotated counterclockwise to open the iris 263 and closethe iris 264 thus rendering the news projector operable.

Various other changes and modifications may be made inthe inventionwithout departing from the spirit thereof.

What is claimed is:

1. In a telegraphicaily controlled projecting apparatus, a telegraphprinter for producing a printed record, a screen, a projectorfor'projecting an image of said printed record upon said screen, aplurality of advertising slides each adapted to be moved to projectionposition, an advertising projector for projecting upon said screen animage of the one of said plurality of advertising slides in projectionposition, means in said telegraph printer responsive to special signalstransmitted by a distant transmitting station for causing saidprojectors to be operable alternately, a carriage for supporting saidplurality of advertising slides, a ratchet on said carriage, a pawloperable when said advertising projector is rendered operable forstepping said carriage, a rack for moving one of said plurality ofslides into projection position, and a pinion for actuating said rackwhen said carriage has been stepped, said pawl and ratchet cooperatingwith said rack and pinion to bring successive slides into projectionposition.

2. In a telegraphically controlled projecting apparatus, a telegraphprinter for producing a printedrecord, a screen, a projector forprojecting an image of said printed record upon said screen, a pluralityof advertising slides each adapted to be moved to projection position,an advertising projector for projecting upon' said screen an image ofthe one of said plurality of slides in projection position, a pair offunction levers in said telegraph printer operable in response tospecial signals received by said telegraph printer for controlling theenergization and de-energization of a pair of electromagnetic circuits,an electromagnet in each of said electromagnetic circuits, saidelectromagnets being effective to cause the alternate operation of saidprojectors, a carriage for supporting said plurality of advertisingslides, means operable when said advertising projector is renderedoperable for stepping said carriage, and means operable when saidcarriage is stepped for moving one of said plurality of slides intoprojection position, said carriage stepping means and said slide movingmeans cooperating to bring successive slides into projection position.

3. In a display apparatus, a telegraph printer for producing a printedrecord, a screen, a first reflector, a projector for projecting an imageof said printed record to said reflector whereby the image is reflectedto said screen, an advertising slide, a second reflector, a secondprojector for projecting an image of said advertising slide to saidsecond reflector, said second reflector reflecting the image of saidadvertising slide to said screen, a carriage for mounting saidreflectors movable to either of two positions, said reflectors beingmounted on said carriage whereby said first reflector is effective whensaid carriage is in one position and said second reflector is effectivewhen said carriage is in the other position, a rack on said carriage, apinion cooperating with said rack, means for actuating said pinionwhereby said pinion coopceived by said telegraph printer for renderingsaid pinion actuating means effective to cause said rack and pinion tomove said carriage alternately from one position to the other.

4. In a display apparatus, a telegraph printer for producing a printedrecord, a screen, a printed record projector for projecting an image ofsaid printed record on said screen, a movable slide carriage having aratchet integral therewith, a plurality of slides removably positionedwithin said carriage, a pawl for cooperation with said ratchet to stepsaid slide carriage from a start position to bring successive ones ofsaid slides into alignment with a projection position, means operablewhen said slide carriage has been stepped a predetermined distance forreturning said slide carriage to said start position, means for movingthe slide in alignment with said projection position into saidprojection position, a slide projector for projecting an image of saidslide in projection position onto said screen, and means in saidtelegraph printer responsive to special signals received thereby forcausing the alternate operation of said printed record projector andsaid slide projector, said pawl and ratchet cooperating to step saidslide carriage and said slide moving means operating to move said slidein alignment with said projection position when said slide projector isrendered operable.

5. In a display apparatus, a telegraph printer for producing a printedrecord, a printed record projector for projecting an image of saidprinted record on said screen, a plurality of slides, a movable carriagehaving said plurality of slides positioned therein, means for movingsaid carriage in a stepped manner from a start position to bringsuccessive ones of said slides into a projection position, meansoperable when said slide carriage has been stepped a predetermineddistance for returning said carriage to said start position, a projectorfor projecting an image of said slide in projection position upon saidscreen, and means in said telegraph printer responsive to specialsignals received thereby for causing the alternate operation of saidprinted record projector and said slide projector, said carriage movingmeans operating to step said carriage when said slide projector isrendered operable.

6. In a display apparatus, a telegraph printer for producing a printedrecord, a screen, a projector for projecting an image of said printedrecord upon said screen, a plurality of slides, means for movingsuccessive ones of said slides individually into projection position, aslide projector for projecting an image of the slide in projectionposition upon said screen, a pair of iris shutters for controlling theoperation of said projectors, gear means on each of said iris shutters,rack means cooperating with said gear means for actuating said irisshutters, and means in said telegraph printer controlled by specialsignals received by said telegraph printer for causing said rack meansand gear means to actuate said iris shutters to cause said projectors tobe operable alternately, said slide moving means be ing operable to movea succeeding one of said slides into projection position whenever saidslide projector is rendered operable.

REGINALD G. SCHULER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 590,903 Newman Sept. 28, 1897941,752 Ashley Nov. 30, 1909 1,060,128 Roebuck Apr. 29, 1913 1,172,628Partington Feb. 22, 1916 1,904,164 Morton et al. Apr. 18, 1933 1,969,440Wheeler et al. Aug. 7, 1934 1,969,461 Hewitt Aug. 7, 1934 1,969,467 Longet al Aug. 7, 1934 2,027,026 Dirkes et al. Jan. 7, 1936'

